scores = {
    "张三": {
        "语文": 80,
        "英语": 90,
        "数学": 100
    },
    "李四": {
        "语文": 81,
        "英语": 91,
        "数学": 99
    },
    "王五": {
        "语文": 82,
        "英语": 92,
        "数学": 98
    }
}

zhangsan_score = scores['张三']['语文']
print(zhangsan_score)

lisi_score = scores.get("李四", {}).get("物理", 0)
print(lisi_score)
